AUDIO UNIT : Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

CHECK FUSES

Check that the following fuses of the audio unit are not are not blown.

FUSES LIST

Unit	Terminals	Signal name	Fuse No.
Audio unit	19	Battery power	29
Audio unit	7	Ignition switch ACC or ON	4

Are the fuses OK?

YES: GO TO 2

NO: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

POWER SUPPLY CIRCUIT CHECK

Disconnect audio unit connector M43.

Check voltage between the audio unit connector M43 ground.

VOLTAGE REFERENCE CHART

(+)		(-)	OFF	ACC	ON
Connector	Terminal	(-)	OFF	ACC	ON
M43	7	Ground	0V	Battery voltage	Battery voltage
M43	19	Ground	Battery voltage	Battery voltage	Battery voltage

Fig 1: Checking Voltage Between Audio Unit Connector M43 Ground

Are the voltage results as specified?

YES: GO TO 3

NO:

Check connector housings for disconnected or loose terminals.
Repair harness or connector.

GROUND CIRCUIT CHECK
Inspect audio unit case ground.

Does case ground pass inspection?

YES: Inspection end.

NO: Repair audio unit case ground.